Earlier quoted context omitted.
Why can you patent a naturally occurring bacteria?
You usually patent the use of such bacteria, not the bacteria per se.
I think it's total nonsense, but the law allows it. If wild bacteria growing on your skin happens to mutate into the exact same genetic code as a patented strain, you could technically be in infringement.
[1] https://internationalprobiotics.org/focus-on-probiotic-paten...